::-webkit-scrollbar {
    width: 4px;
    height: 3px;
    background: transparent;
    margin-left: 5px;
}
::-webkit-scrollbar-thumb {
    border-radius: 3px; /*滚动条的圆角*/
    background-color: #dcdfe6; /*滚动条的背景颜色*/
    transition:background-color 1s ease-in-out;
}
::-webkit-scrollbar-track {
    border-radius: 3px; /*滚动条的背景区域的圆角*/
}
::-webkit-scrollbar-thumb:hover {
    background-color: #ccc;
}
::-webkit-scrollbar-thumb:active {
    cursor: pointer;
}
